WO2022075087A1 - Soufflante - Google Patents

Soufflante Download PDF

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Publication number
WO2022075087A1
WO2022075087A1 PCT/JP2021/035043 JP2021035043W WO2022075087A1 WO 2022075087 A1 WO2022075087 A1 WO 2022075087A1 JP 2021035043 W JP2021035043 W JP 2021035043W WO 2022075087 A1 WO2022075087 A1 WO 2022075087A1
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WO
WIPO (PCT)
Prior art keywords
main plate
fan
axis
shaft
flat surface
Prior art date
Application number
PCT/JP2021/035043
Other languages
English (en)
Japanese (ja)
Inventor
文也 石井
昇一 今東
修三 小田
Original Assignee
株式会社デンソー
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社デンソー filed Critical 株式会社デンソー
Priority to CN202180068293.5A priority Critical patent/CN116324183A/zh
Publication of WO2022075087A1 publication Critical patent/WO2022075087A1/fr
Priority to US18/295,316 priority patent/US20230243362A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/04—Shafts or bearings, or assemblies thereof
    • F04D29/043—Shafts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/263—Rotors specially for elastic fluids mounting fan or blower rotors on shafts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2260/00—Function
    • F05D2260/30—Retaining components in desired mutual position
    • F05D2260/37—Retaining components in desired mutual position by a press fit connection

Definitions

  • This disclosure relates to a blower.
  • Patent Document 1 Conventionally, the blower described in Patent Document 1 is known.
  • This blower includes a fan that is press-fitted and fixed to the shaft of an electric motor, and a cap as a detent member that is press-fitted and fixed to the end of the shaft and the fan to regulate the relative rotation between the shaft and the fan.
  • the blower described in Patent Document 1 is configured to be press-fitted and fixed to a shaft in a state where a fan and a cap are temporarily assembled in an assembly process.
  • the press-fitting load of the cap on the shaft is set to be larger than the press-fitting load of the fan on the shaft. Therefore, in this blower, when the fan and the cap are press-fitted and fixed to the shaft in the assembly process, a load is applied to the axial end surface of the cap located on the shaft core or near the shaft core, so that the load is applied to the shaft.
  • the fan may tilt. If the inclination of the fan with respect to the shaft becomes large, the imbalance of the center of gravity becomes large, and there is a concern that the vibration during fan rotation increases. It is an object of the present disclosure to provide a blower capable of suppressing imbalance of the center of gravity and reducing vibration during fan rotation.
  • the blower comprises a drive unit, a shaft, a fan and a detent member.
  • the shaft rotates according to the torque output by the drive unit.
  • the fan is arranged around a shaft core between a main plate having a shaft hole to be press-fitted and fixed to the shaft, a shroud provided facing the main plate and having an air suction port in the center, and between the shroud and the main plate. It has multiple wings.
  • the detent member is fixed to the shaft and main plate to regulate the relative rotation between the shaft and the fan.
  • the main plate of the fan is provided on the outside of the detent member, with an inclined portion that inclines toward the drive portion as it moves radially outward from the shaft hole, and intermittently or continuously around the shaft core in a part of the inclined portion. It has a flat surface portion perpendicular to the axis.
  • the blower can apply a load to the flat surface portion by a pressing jig or the like. Since the flat surface portion is a plane perpendicular to the shaft core of the fan (that is, the center of the shaft hole of the fan), a load is applied from the pressing jig to the flat surface portion in parallel with the shaft core of the fan and the shaft. Applied. Further, since the flat surface portion is provided on the outer side in the radial direction from the detent member, it is possible to suppress the inclination of the fan at the time of press-fitting as compared with applying a load only to the detent member.
  • the flat surface portion is compared with applying a load only to the detent member.
  • this blower can suppress the imbalance of the center of gravity during the assembly process and reduce the vibration during the rotation of the fan.
  • FIG. 1 is a top view of FIG. 1 in the II direction.
  • FIG. 3 is a cross-sectional view taken along the line III-III of FIG. It is an enlarged view of the IV part of FIG. It is a graph which shows the experimental result which measured the degree of imbalance between the blower of 1st Embodiment and the blower of a comparative example.
  • FIG. 6 is a plan view in the VII direction of FIG. It is sectional drawing which cut
  • the blower of the present embodiment is a centrifugal blower used for, for example, an air conditioner or a ventilation device.
  • the blower 1 includes a drive unit 2, a shaft 3, a fan 4, a detent member 5, and the like.
  • the drive unit 2 has an electric motor that outputs torque by energization.
  • the drive unit 2 is fixed to a housing 6 such as an air conditioner.
  • the shaft 3 protruding from the electric motor of the drive unit 2 rotates around the axis of the shaft 3 by the torque output by the electric motor.
  • the fan 4 is a centrifugal fan, and is a main plate 10 formed in a substantially disk shape, a shroud 20 provided facing the main plate 10, and a shroud 20 and the main plate 10 between the shroud 20 and the main plate 10 around the axis CL of the fan 4. It has a plurality of blades 30 to be arranged.
  • the shaft core CL of the fan 4 refers to the center of the shaft hole 11 provided in the main plate 10 of the fan 4.
  • the shaft core CL of the fan 4 and the shaft core of the shaft 3 coincide with each other.
  • the shroud 20 has a tubular portion 22 forming an air suction port 21 and a portion of the tubular portion 22 on the drive portion 2 side, which gradually approaches the main plate 10 in the radial direction and is radially outward along the main plate 10. It has an annular portion 23 extending to.
  • the plurality of wings 30 are provided between the main plate 10 and the shroud 20.
  • the plurality of blades 30 are arranged at predetermined intervals in the rotation direction.
  • the leading edge 31 of the wing 30 is located radially inside the diameter Df of the suction port 21 of the shroud 20.
  • one portion 33 in the axis CL direction is connected to the shroud 20, and the other portion 34 in the axis CL direction is connected to the main plate 10. That is, the fan 4 of the present embodiment is a closed fan in which the main plate 10, the shroud 20, and the plurality of wings 30 are integrally formed.
  • the fan 4 is integrally formed by, for example, resin injection molding.
  • the main plate 10 is formed in a substantially disk shape.
  • the main plate 10 has a shaft hole 11 in the central portion thereof.
  • the shaft 3 is press-fitted and fixed to the shaft hole 11 of the main plate 10.
  • a plurality of fitting recesses 12 into which the legs 52 of the detent member 5 described below are fitted are provided.
  • the detent member 5 is a member that is fixed to the shaft 3 and the main plate 10 and regulates the relative rotation between the shaft 3 and the fan 4.
  • the detent member 5 is also called a fan cap.
  • the detent member 5 has a cylindrical boss portion 51 and a plurality of leg portions 52 extending from the boss portion 51 toward the drive portion 2.
  • the surface 53 of the boss portion 51 facing the suction port 21 side is formed in a plane perpendicular to the axis CL.
  • the boss portion 51 has a central hole 54 in the center of which the shaft 3 is press-fitted and fixed.
  • the press-fitting load between the central hole 54 and the shaft 3 of the boss portion 51 is set to be larger than the press-fitting load between the shaft hole 11 and the shaft 3 of the main plate 10. Therefore, the detenting force between the detent member 5 and the shaft 3 is set to be larger than the detenting force between the fan 4 and the shaft 3.
  • the plurality of fitting recesses 12 include a first protrusion 55 that protrudes radially outward from a surface of the inner wall of the fitting recess 12 that faces radially outward, and the inner wall of the fitting recess 12 that faces the circumferential direction.
  • a second protrusion 56 that protrudes from the surface in the circumferential direction is formed.
  • the detent member 5 and the fan 4 can be press-fitted and fixed to the shaft 3 in a state where the detent member 5 and the fan 4 are temporarily assembled.
  • the shaft 3 rotates due to the torque output by the drive unit 2.
  • the rotation of the shaft 3 is transmitted from the detent member 5 to the fan 4, and the detent member 5 and the fan 4 rotate together with the shaft 3.
  • the fan 4 rotates, the air sucked from the suction port 21 flows from the leading edge 31 of the blade 30 to the flow path between the plurality of blades 30, and the radial outer end of the shroud 20 and the main plate 10 and the blade. It is blown out radially outward from the air outlet formed between the trailing edge 32 and the fan 4.
  • the main plate 10 of the fan 4 has the inclined portion 13, the stepped portion 14, in addition to the shaft hole 11 and the fitting recess 12 described above. It has a plurality of protrusions 15, a flat surface portion 16, a rib 17, and the like. These parts of the main plate 10 are also integrally molded with resin at the time of injection molding of the fan 4.
  • the inclined portion 13 is a portion that is outside the detent member 5 and is inclined toward the drive portion 2 as the distance from the shaft hole 11 is radially outward. In other words, it can be said that the inclined portion 13 is inclined so as to be convex inward toward the suction port 21 from the portion where the leading edge 31 of the wing 30 and the main plate 10 are connected. The inclined portion 13 guides the air sucked from the suction port 21 toward the flow path formed between the plurality of blades 30.
  • the step portion 14 is a portion formed in a part of the inclined portion 13.
  • the step portion 14 is formed so that the angle formed by the shaft core CL is vertical. Further, the step portion 14 is formed in an annular shape around the axis CL. In the present embodiment, the step portion 14 is formed at a position closer to the detent member 5 than the leading edge 31 of the wing 30.
  • the plurality of protrusions 15 are provided on a part of the inclined portion 13. Specifically, in the present embodiment, the three protrusions 15 are provided on the stepped portion 14 formed in a part of the inclined portion 13 at a predetermined distance from each other around the axis CL. In the present embodiment, the number of protrusions 15 is 3, but the number of protrusions 15 may be 3 or more, and the number can be arbitrarily set.
  • the plurality of protrusions 15 extend from the step portion 14 to the suction port 21 side in parallel with the axis CL.
  • the surface of the protrusion 15 facing the suction port 21 is a flat surface perpendicular to the axis CL.
  • the surface of the protrusion 15 facing the suction port 21 constitutes the flat surface portion 16. That is, among the plurality of protrusions 15, the plurality of flat surface portions 16 composed of the surfaces facing the suction port 21 side are planes perpendicular to the axis CL, and a part of the inclined portion 13 is around the axis CL. It is provided intermittently. Further, the plurality of flat surface portions 16 have the same height in the axis CL direction. In other words, the plurality of plane portions 16 are formed on the same virtual plane perpendicular to the axis CL.
  • Ribs 17 are provided on the parts of the main plate 10 opposite to the suction port 21 with respect to the parts where the plurality of protrusions 15 are provided.
  • the rib 17 increases the rigidity of a portion of the main plate 10 where a plurality of protrusions 15 are provided and the periphery thereof.
  • the rib 17 has a main plate 10 when a load is applied to the drive portion 2 side in parallel with the axis CL with respect to the flat surface portion 16 which is the surface of the protrusion 15 facing the suction port 21 side. Of these, the portion where the plurality of protrusions 15 are provided and the periphery thereof are prevented from being deformed to the drive portion 2 side.
  • the diameter of the virtual circle VC centered on the axis CL is connected by connecting the centers of the flat surface portions 16 which are the surfaces of the plurality of protrusions 15 facing the suction port 21 side. Let it be Da.
  • the outer diameter of the detent member 5 is Dc.
  • the diameter of the suction port 21 of the shroud 20 is defined as Df. At this time, there is a relationship of Dc ⁇ Da ⁇ Df. The significance of this will be described below.
  • the detent member 5 and the fan 4 can be press-fitted and fixed to the shaft 3 in a state where the detent member 5 and the fan 4 are temporarily assembled. Is. At this time, a load is applied to the surface 53 of the detent member 5 facing the suction port 21 side by a pressing jig (not shown), and the flat surface portion 16 of the plurality of protrusions 15 facing the suction port 21 side is applied. Even if the load is applied.
  • the diameter Da of the virtual circle VC connecting the centers of the plurality of flat surface portions 16 and the outer diameter Dc of the detent member 5 have a relationship of Da> Dc. That is, the flat surface portion 16 is provided outside the detent member 5. Therefore, it is possible to suppress the inclination of the fan 4 at the time of press-fitting by applying the load to the flat surface portion 16 as compared with applying the load only to the detent member 5.
  • the tolerance of the squareness with respect to the shaft core CL on the surface 53 of the detent member 5 facing the suction port 21 side and the tolerance of the squareness with respect to the shaft core CL in the flat surface portion 16 are the same.
  • the inclination angle of the virtual circle VC connecting the centers of the plurality of flat surface portions 16 with respect to the axis CL is larger than the inclination angle of the detent member 5 with respect to the axis CL due to the tolerance on the surface 53 facing the suction port 21 side. It will be small. Therefore, it is possible to suppress the inclination of the fan 4 at the time of press-fitting by applying the load to the flat surface portion 16 as compared with applying the load only to the detent member 5.
  • ribs 17 are provided on the portions of the main plate 10 opposite to the suction port 21 with respect to the portions where the plurality of protrusions 15 are provided. Therefore, when a load is applied to the flat surface portion 16 of the plurality of protrusions 15 facing the suction port 21 side in parallel with the axis CL in the assembly process, the plurality of protrusions 15 of the main plate 10 are applied. It is suppressed that the portion where the is provided and its surroundings are deformed to the drive unit 2 side. Therefore, since the load is applied from the pressing jig to the flat surface portion 16 in parallel with the shaft core CL, it is possible to suppress the inclination of the fan 4 at the time of press fitting.
  • the flat surface portion 16 is provided radially outside the diameter Df of the suction port 21 of the shroud 20, when a load is applied to the flat surface portion 16 when the fan 4 is press-fitted, the flat surface portion 16 and its surroundings are provided. Is considered to bend toward the drive unit 2. In that case, it becomes difficult to apply a load from the pressing jig to the flat surface portion 16 in parallel with the shaft core CL, and the fan 4 may be tilted and press-fitted into the shaft 3.
  • the diameter Da of the virtual circle VC connecting the centers of the plurality of flat surface portions 16 and the diameter Df of the suction port 21 of the shroud 20 have a relationship of Da ⁇ Df. That is, the flat surface portion 16 is provided inside the diameter Df of the suction port 21 of the shroud 20.
  • FIG. 5 shows the experimental results of measuring the degree of imbalance between the blower 1 of the first embodiment described above and the blower of the comparative example.
  • the degree of unbalance refers to the amount of deviation of the position of the center of gravity of the fan 4 when the blower 1 is rotationally driven.
  • blower of the comparative example used in the experiment in the assembling process, with the detent member 5 and the fan 4 temporarily assembled, a load is applied from the pressing jig only to the surface 53 of the detent member 5 facing the suction port 21 side. Is applied, and the detent member 5 and the fan 4 are press-fitted and fixed to the shaft 3.
  • the blower of the comparative example and the blower 1 of the first embodiment have substantially the same configuration.
  • blower of the comparative example and the blower 1 of the first embodiment were installed in an unbalance measuring device (not shown), and the degree of unbalance when the electric motor of the drive unit 2 was driven at the same rotation speed was measured. As a result, it was found that the blower 1 of the first embodiment has a 75% reduction in the degree of imbalance as compared with the blower of the comparative example. From this, it can be said that the blower 1 of the first embodiment has lower vibration than the blower of the comparative example.
  • the blower 1 of the first embodiment described above has the following effects.
  • the main plate 10 of the fan 4 included in the blower 1 is tilted with an inclined portion 13 that is inclined toward the drive unit 2 side as it moves radially outward from the shaft hole 11 outside the detent member 5.
  • a part of the portion 13 has a flat surface portion 16 provided intermittently around the axis CL.
  • the flat surface portion 16 is a plane perpendicular to the axis CL.
  • the blower 1 can apply a load to the flat surface portion 16 by a pressing jig or the like. be. Since the flat surface portion 16 is a plane perpendicular to the shaft core CL, a load is applied from the pressing jig to the flat surface portion 16 in parallel with the shaft core CL of the fan 4 and the shaft 3. Further, since the flat surface portion 16 is provided on the radial side of the detent member 5, the inclination of the fan 4 at the time of press fitting can be suppressed as compared with applying a load only to the detent member 5. It is possible. Therefore, the blower 1 can suppress the imbalance of the center of gravity during the assembly process and reduce the vibration during the rotation of the fan.
  • the main plate 10 of the fan 4 has three or more protrusions 15 provided around the axis CL on a part of the inclined portion 13.
  • the flat surface portion 16 is a surface of the protrusions 15 facing the suction port 21 side.
  • the flat surface portion 16 can be formed relatively easily by setting the surface of the protrusions 15 provided on a part of the inclined portion 13 facing the suction port 21 side as the flat surface portion 16.
  • the axial core CL in the flat surface portion 16 is formed by processing and modifying the portion of the mold used for injection molding of the fan 4 that forms the axial end surface (that is, the flat surface portion 16) of the protrusion portion 15.
  • the accuracy of squareness and flatness with respect to can be improved. That is, it is possible to relatively easily form the plurality of plane portions 16 on the same virtual plane perpendicular to the axis CL.
  • the main plate 10 of the fan 4 has a stepped portion 14 in which an angle formed with the axis CL is formed vertically in a part of the inclined portion 13.
  • the plurality of protrusions 15 are provided on the step portion 14. According to this, even when the protrusion 15 and its surroundings are slightly bent toward the drive portion 2 when a load is applied from the pressing jig to the flat surface portion 16 formed on the protrusion 15 in the assembly process. , It is possible to prevent the inclined portion 13 of the fan 4 from interfering with the pressing jig. Therefore, it is possible to apply a load from the pressing jig to the flat surface portion 16 formed on the protrusion 15 in parallel with the shaft core CL, and it is possible to prevent the fan 4 from tilting at the time of press fitting.
  • the stepped portion 14 of the main plate 10 of the fan 4 is formed in an annular shape around the axis CL. According to this, it is possible to simplify the structure of the mold used at the time of injection molding of the fan 4 and to form the stepped portion 14 relatively easily. Further, as compared with the configuration in which the step portion 14 is intermittently formed around the shaft core CL, the air resistance during fan rotation can be reduced by forming the step portion 14 in an annular shape around the shaft core CL. It is possible.
  • the main plate 10 of the fan 4 has a rib 17 at a portion opposite to the suction port 21 with respect to a portion where the protrusion 15 is provided. According to this, in the assembly process, when a load is applied from the pressing jig to the flat surface portion 16 formed on the protrusion portion 15, the protrusion portion 15 and its surroundings are deformed to the drive portion 2 side by the rib 17. Can be prevented. Therefore, it is possible to apply a load from the pressing jig to the flat surface portion 16 formed on the protrusion 15 in parallel with the shaft core CL, and it is possible to prevent the fan 4 from tilting at the time of press fitting.
  • the diameter Da of the virtual circle VC connecting the centers of the plurality of flat surface portions 16 and the outer diameter Dc of the detent member 5 have a relationship of Da> Dc. According to this, it is possible to suppress the inclination of the fan 4 at the time of press-fitting by applying the load to the flat surface portion 16 as compared with applying the load only to the detent member 5. Specifically, it is assumed that the tolerance of the squareness with respect to the shaft core CL on the surface 53 of the detent member 5 facing the suction port 21 side and the tolerance of the squareness with respect to the shaft core CL in the flat surface portion 16 are the same.
  • the inclination angle of the virtual circle VC connecting the centers of the plurality of flat surface portions 16 with respect to the axis CL is larger than the inclination angle of the detent member 5 with respect to the axis CL due to the tolerance on the surface 53 facing the suction port 21 side. It will be small. Therefore, it is possible to suppress the inclination of the fan 4 at the time of press-fitting by applying the load to the flat surface portion 16 as compared with applying the load only to the detent member 5.
  • the diameter Da of the virtual circle VC connecting the centers of the plurality of flat surface portions 16 and the diameter Df of the suction port 21 of the shroud 20 have a relationship of Da ⁇ Df. According to this, even when a press-fitting load is applied to the flat surface portion 16 at the time of press-fitting the fan 4, bending of the flat surface portion 16 and its surroundings is suppressed. Therefore, it is possible to apply a load from the pressing jig to the flat surface portion 16 in parallel with the shaft core CL, and it is possible to prevent the fan 4 from tilting at the time of press fitting.
  • the second embodiment will be described.
  • the second embodiment is a modification of the configuration of the fan 4 with respect to the first embodiment, and the other parts are the same as those of the first embodiment. Therefore, only the parts different from the first embodiment will be described. do.
  • the main plate 10 of the fan 4 is not provided with a stepped portion. Therefore, the plurality of protrusions 15 are directly provided on a part of the inclined portion 13 of the main plate 10 of the fan 4. Also in the second embodiment, the number of the protrusions 15 is three, but the number of the protrusions 15 may be three or more, and the number can be arbitrarily set.
  • the three protrusions 15 are provided around the axis CL at predetermined intervals.
  • the plurality of protrusions 15 extend from the inclined portion 13 to the suction port 21 side in parallel with the axis CL.
  • the surface of the protrusion 15 facing the suction port 21 is a flat surface perpendicular to the axis CL.
  • the surface of the protrusion 15 facing the suction port 21 side constitutes the flat surface portion 16.
  • the plurality of flat surface portions 16 composed of the surfaces facing the suction port 21 side are planes perpendicular to the axis CL, and are intermittent around the axis CL to a part of the inclined portion 13. It is provided.
  • the plurality of flat surface portions 16 have the same height in the axis CL direction. In other words, the plurality of plane portions 16 are formed on the same virtual plane perpendicular to the axis CL.
  • Ribs 17 are provided on the parts of the main plate 10 opposite to the suction port 21 with respect to the parts where the plurality of protrusions 15 are provided.
  • the rib 17 increases the rigidity of a portion of the main plate 10 where a plurality of protrusions 15 are provided and the periphery thereof. That is, in the assembly process, when a load is applied from the pressing jig to the flat surface portion 16 formed on the protrusion portion 15, the protrusion portion 15 and its surroundings are prevented from being deformed to the drive portion 2 side by the rib 17. be able to
  • the diameter Da of the virtual circle VC connecting the centers of the plurality of plane portions 16 and the outer diameter Dc of the detent member 5 have a relationship of Dc ⁇ Da.
  • the diameter Da of the virtual circle VC connecting the centers of the plurality of flat surface portions 16 and the diameter Df of the suction port 21 of the shroud 20 have a relationship of Da ⁇ Df.
  • the blower 1 of the second embodiment described above can also have the same effect as that of the first embodiment.
  • the protrusion 15 and its surroundings are deformed so as to be recessed toward the drive portion 2, and the main plate 10 is tilted.
  • the portion of the portion 13 that is radially inside the protrusion 15 and the pressing jig may interfere with each other.
  • the portion of the inclined portion 13 of the main plate 10 that is radially inside the protrusion 15 and the pressing jig are pressed.
  • the third embodiment will be described.
  • the third embodiment is the same as the first and second embodiments in that a part of the configuration of the fan 4 is modified with respect to the first and second embodiments, and therefore the first and second embodiments are the same. 2 Only the part different from the embodiment will be described.
  • the main plate 10 of the fan 4 is not provided with the protrusion 15. Instead, the main plate 10 of the fan 4 has a stepped portion 14 in a part of the inclined portion 13.
  • the step portion 14 is formed so that the angle formed by the shaft core CL is vertical. Further, the step portion 14 is formed in an annular shape around the axis CL.
  • the stepped portion 14 provided in a part of the inclined portion 13 supplied by the main plate 10 of the fan 4 constitutes a flat surface portion 16 perpendicular to the axis CL. That is, the flat surface portion 16 of the third embodiment is continuously provided around the axis CL on a part of the inclined portion 13.
  • Ribs 17 are provided in the portions of the main plate 10 opposite to the suction port 21 with respect to the portion where the step portion 14 is provided.
  • the rib 17 increases the rigidity of the portion of the main plate 10 where the step portion 14 is provided and its surroundings. That is, in the assembly process, when a load is applied to the step portion 14 from the pressing jig, the rib 17 can prevent the step portion 14 and its surroundings from being deformed toward the drive portion 2.
  • the diameter Da of the virtual circle VC connecting the centers of the flat surface portions 16 configured as the stepped portions 14 and the outer diameter Dc of the detent member 5 have a relationship of Dc ⁇ Da.
  • the diameter Da of the virtual circle VC connecting the centers of the flat surface portions 16 configured as the stepped portions 14 and the diameter Df of the suction port 21 of the shroud 20 have a relationship of Da ⁇ Df.
  • the blower 1 of the third embodiment described above can also exert the same action and effect as those of the first and second embodiments. That is, the blower 1 can suppress the inclination of the fan 4 at the time of press-fitting by using the step portion 14 provided on a part of the inclined portion 13 of the main plate 10 as the flat surface portion 16. Therefore, even in the configuration of the blower 1 of the third embodiment, it is possible to suppress the imbalance of the center of gravity during the assembly process and reduce the vibration during the rotation of the fan.
  • the flat surface portion 16 has a surface of the plurality of protrusions 15 facing the suction port 21 side as a surface perpendicular to the axis CL. It is not limited to such a configuration.
  • the plane portion 16 may be a virtual plane formed by connecting the vertices of a plurality of protrusions having a rounded end of the protrusion 15.
  • the shape of the plurality of protrusions 15 provided on the main plate 10 of the blower 1 is cylindrical, but the shape is not limited to this, and for example, the shape of the protrusions 15 is prismatic. Alternatively, it may be fan-shaped or annular around the axis CL in the axial direction.
  • a plurality of protrusions 15 are provided around the axis CL at substantially equal intervals on a part of the inclined portion 13 of the main plate 10 of the blower 1, but the present invention is not limited to this, for example. , The plurality of protrusions 15 may be provided at uneven intervals.
  • the stepped portion 14 is formed in an annular shape on a part of the inclined portion 13 of the main plate 10 of the blower 1, but the stepped portion 14 is not limited to this, and for example, the stepped portion 14 has a shaft core CL. It may be formed intermittently in the circumferential direction as the center.
  • the fan 4 and the detent member 5 are configured as separate members, but the present invention is not limited to this, and for example, the fan 4 and the detent member 5 may be integrally configured.
  • the drive unit 2 has been described as having an electric motor, but the present invention is not limited to this, and various drive devices that output torque can be adopted as the drive unit 2.
  • the present disclosure is not limited to the above-described embodiment, and can be changed as appropriate. Further, the above embodiments are not unrelated to each other, and can be appropriately combined unless the combination is clearly impossible. Further, in each of the above embodiments, it goes without saying that the elements constituting the embodiment are not necessarily essential except when it is clearly stated that they are essential or when they are clearly considered to be essential in principle. stomach. Further, in each of the above embodiments, when numerical values such as the number, numerical values, quantities, and ranges of the constituent elements of the embodiment are mentioned, when it is clearly stated that they are particularly essential, and when it is clearly limited to a specific number in principle. It is not limited to the specific number except when it is done. Further, in each of the above embodiments, when the shape, positional relationship, etc. of the constituent elements are referred to, the shape, the shape, etc. It is not limited to the positional relationship.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

La présente invention concerne une soufflante qui comprend une partie d'entraînement (2), un arbre (3), un ventilateur (4) et un élément anti-rotation (5). L'arbre (3) tourne par l'intermédiaire d'une sortie de couple en provenance de la partie d'entraînement (2). Le ventilateur (4) comprend une plaque principale (10) ayant un trou (11) d'arbre qui est fixée par ajustement par pression à l'arbre (3), un épaulement (20) disposé face à ladite plaque principale (10) et présentant un orifice d'admission (21) pour l'air au centre de celui-ci, et une pluralité d'ailes (30) agencées autour d'un centre axial (CL) entre l'épaulement (20) et la plaque principale (10). L'élément anti-rotation (5) est fixé à l'arbre (3) et à la plaque principale (10) et régule la rotation relative de l'arbre (3) et du ventilateur (4). En outre, la plaque principale (10) présente, davantage vers l'extérieur que l'élément anti-rotation (5), une partie inclinée (13) qui, en tant que ladite partie inclinée (13), s'éloigne du trou (11) d'arbre dans la direction radiale vers l'extérieur, s'incline vers le côté partie d'entraînement (2), et une partie de surface plane (16) qui est prévue au niveau d'une portion de ladite partie inclinée (13) de manière intermittente ou continue autour du centre axial (CL), et qui est perpendiculaire au centre axial (CL).
PCT/JP2021/035043 2020-10-07 2021-09-24 Soufflante WO2022075087A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN202180068293.5A CN116324183A (zh) 2020-10-07 2021-09-24 送风机
US18/295,316 US20230243362A1 (en) 2020-10-07 2023-04-04 Blower

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2020169959A JP2022061799A (ja) 2020-10-07 2020-10-07 送風機
JP2020-169959 2020-10-07

Related Child Applications (1)

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US18/295,316 Continuation US20230243362A1 (en) 2020-10-07 2023-04-04 Blower

Publications (1)

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WO2022075087A1 true WO2022075087A1 (fr) 2022-04-14

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PCT/JP2021/035043 WO2022075087A1 (fr) 2020-10-07 2021-09-24 Soufflante

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US (1) US20230243362A1 (fr)
JP (1) JP2022061799A (fr)
CN (1) CN116324183A (fr)
WO (1) WO2022075087A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009264245A (ja) * 2008-04-25 2009-11-12 Denso Corp 遠心多翼ファン、遠心式送風機および遠心式送風機の製造方法
JP2020033889A (ja) * 2018-08-28 2020-03-05 株式会社ケーヒン 送風機に用いられる回転防止部材

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009264245A (ja) * 2008-04-25 2009-11-12 Denso Corp 遠心多翼ファン、遠心式送風機および遠心式送風機の製造方法
JP2020033889A (ja) * 2018-08-28 2020-03-05 株式会社ケーヒン 送風機に用いられる回転防止部材

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CN116324183A (zh) 2023-06-23
JP2022061799A (ja) 2022-04-19

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